Tailored artificial solid electrolyte interphase (SEI) is favorable for the stabilization of Li metal batteries (LMBs) and Li anode dendrite suppression. Here, an open framework perovskite derivate SEI with fluorinated heterogeneous nanodomains is proposed. The nano-structural K₃FeF₆ perovskite coating on Li anode can spontaneously convert into the robust SEI composed of KF, LiF and Fe nanodomains. The introduction of KF and Fe components could enhance the interface conductivity around LiF domains in SEI, beneficial for the homogenization of Li-ion flux and Li-mass plating. The residual K₃FeF₆ component with 3D open channels (even after long-term cycling) can serve as isotropic porous modulator to reduce the local current density and mitigate the volume change of electrode. This perovskite modified Li anode enables a long cycling life of 1100 h under 2 mAh cm⁻² capacity for Li||Li symmetric cells. The modified LMBs with LiNi_0.8Co_0.1Mn_0.1O₂ cathode exhibit the ultralong 3300 cycles at 1 C. The corresponding pouch cells based on thick cathode (30 mg cm⁻²) enable a reversible capacity as high as 1.5 Ah, corresponding to an energy density of 236 Wh kg⁻¹ based on the weight of whole packet under the protocols of N/P ratio of 1.28 and E/C ratio of 4.23 g Ah⁻¹.

定制的人造固体电解质界面（SEI）有利于锂金属电池（LMB）的稳定和锂负极枝晶的抑制。在这里，提出了一种具有氟化异质纳米域的开放框架钙钛矿衍生物 SEI。Li 阳极上的纳米结构 K ₃ FeF _{6钙钛矿涂层可以自发地转化为由 KF、LiF 和 Fe 纳米域组成的稳健 SEI。}KF和Fe组分的引入可以增强SEI中LiF域周围的界面电导率，有利于锂离子通量和锂质量电镀的均匀化。残留的K ₃ FeF ₆具有 3D 开放通道的组件（即使在长期循环后）可以用作各向同性多孔调制器，以降低局部电流密度并减轻电极的体积变化。这种钙钛矿改性的 Li 负极可使Li||Li 对称电池在 2 mAh cm ^-2容量下实现 1100 小时的长循环寿命。_{具有 LiNi 0.8} Co _0.1 Mn _0.1 O ₂阴极的改性 LMB在 1 C 下表现出超长的 3300 次循环。相应的基于厚阴极 (30 mg cm ^-2 )的软包电池可实现高达 1.5 Ah 的可逆容量，对应于能量密度为 236 Wh kg ^{−1基于在N/P比为1.28和E/C比为4.23 g Ah -1 的}协议下的整个数据包的重量。